WCF Discovery UDPEndpoint did not work after published on IIS

Question

I made a test with WCF Discovery UDPEndpoint, it works at my own computer, but if I publish it to IIS, and then call it from other computers, it could not be found.

I have set the address with IP.

Service

using (ServiceHost host = new ServiceHost(typeof(DiscoveryProxy), new Uri("http://xx.xxxx.xxx.xxx:8080/DiscoveryProxy")))
{
    ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
    smb.HttpGetEnabled = true;
    host.Description.Behaviors.Add(smb);
    ServiceEndpoint sep= host.AddServiceEndpoint(typeof(IDiscoveryProxy),new BasicHttpBinding(),"");
    sep.ListenUri = new Uri("http://xx.xxxx.xxx.xxx:8080/DiscoveryProxy/via");
    ServiceDiscoveryBehavior sdb = new ServiceDiscoveryBehavior();
    sdb.AnnouncementEndpoints.Add(new UdpAnnouncementEndpoint());
    host.Description.Behaviors.Add(sdb);
    host.AddServiceEndpoint(new UdpDiscoveryEndpoint());

    host.Open();
    Console.WriteLine("service is open");
    Console.ReadLine();
    host.Close();
}

The service reference is added correctly at Client, and I could browse the service from IE. But it could not be discovery by UDP.

Client

    DiscoveryClient client = new DiscoveryClient(new UdpDiscoveryEndpoint());
    FindResponse response = client.Find(new FindCriteria(typeof(myDiscoveryProxy)));
    if (response.Endpoints.Count > 0)
    {
        EndpointAddress address = response.Endpoints[0].Address;
        Console.WriteLine("service address is " + address);
        ServiceReference2.myDiscoveryProxyClient service = new ServiceReference2.myDiscoveryProxyClient(new BasicHttpBinding(), address);
        service.getString("discovery proxy");
    }

I have opened the UDP port both in client and service. Is there any way to troubleshooting this issue?

Answer 1

It seems I have achieved my requirements. I configure firewall in my Service side. Windows Firewall with Advanced Security->Inbound Rules->New Rule->Port->UDP->All local ports->Allow the connection->Domain,Private,Public->Name for this rule. But I am not sure why I need this, my application has already configured Udp protocol in firewall.